1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
BabaBlast [244]
3 years ago
11

The mean of 15 numbers is 12. An extra number is included and the mean increases to 13. What the extra number?

Mathematics
1 answer:
Studentka2010 [4]3 years ago
5 0

Answer: 28

Step-by-step explanation:

The mean of 15 numbers = 12

Then , the sum of the numbers = 12x15 = 180

Let the extra number included be x , then

The new sum = x + 180

And the new total number will increase from 15 to 16

new mean = 13 , so we have :

\frac{x+180}{16} = 13

x+ 180 = 16(13)

x + 180 = 208

x = 208 - 180

x = 28

therefore , the extra number is 28

You might be interested in
What is the square footage of a ploygon that is 120 x 100?
viva [34]

Answer:

12000

Step-by-step explanation:

8 0
3 years ago
I need help with 0.97 of 1/10 of
Svetach [21]
Its .097. Just move the decimal

8 0
3 years ago
Round 5.599 to the nearest hundredth
pantera1 [17]

Not entirely sure but its like 5.6 or 5.7

5 0
3 years ago
Read 2 more answers
..........................................................
Yakvenalex [24]

Answer:

........??

Step-by-step explanation:

huh whattt

7 0
3 years ago
Read 2 more answers
What is the value of the expression?<br> 3<br> 131<br> 3<br> 152
Anettt [7]
Is there suppose to be a image before I don’t get it.
3 0
3 years ago
Other questions:
  • If r is ten more than the square root of l , then r = A) l2 + 10 B) (l + 10)2 C) l + 10 D) l + 10 E) l + 10
    11·1 answer
  • Given the formula y=3x+4 enter the value of y
    9·1 answer
  • How many solutions are there to the equation below 9x + 27 = 9( x + 2 ) + 9
    14·2 answers
  • Thirty subtracted from four times a number is greater than the opposite of 10
    14·1 answer
  • You have recorded your car mileage and gasoline use for 5 weeks Estimate the
    14·2 answers
  • 15 points !<br> Find m &lt; RQP
    14·1 answer
  • Linda is buying boxes of ice cream sandwiches for her class party. She has to decide how many boxes she should purchase. A formu
    15·1 answer
  • X-intercept =2; y-intercept =4/3 Find he equation of the line​
    11·1 answer
  • Giving 100 points and giving brainlest
    9·2 answers
  • If the area of a semicircle is 32 sq. km, then its radius is:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!